I have the same problem, with LE (upgraded from OE) 7.02 running on NUC i5 , with a pc (windows) running VNC Viewer Plus. Had no issues with OE. Blocks, fuzzy display, distortions. Super hard to use. tried various versions of X11VNC, same results.
any clues to the cause?
I had a similar issue and it got better after disabling the vertical blank sync in the system settings.